Mounting rail base plate



FIG. 1 is a front, top, left-side, perspective view of a mounting rail base plate showing my new design shown mounted between an optional helmet and mounting rail;

FIG. 2 is a front, top, left-side, perspective view of the mounting rail base plate shown in FIG. 1 with the optional mounting rail removed for clarity;

FIG. 3 is a rear, bottom, left-side, perspective view of the mounting rail base plate shown in FIG. 1;

FIG. 4 is a front elevational view of the mounting rail base plate shown in FIG. 1;

FIG. 5 is a rear elevational view of the mounting rail base plate shown in FIG. 1;

FIG. 6 is a left-side elevational view of the mounting rail base plate shown in FIG. 1;

FIG. 7 is a left-side elevational view of the mounting rail base plate shown in FIG. 1 with the optional mounting rail removed for clarity;

FIG. 8 is a right-side elevational view of the mounting rail base plate shown in FIG. 1;

FIG. 9 is a top plan view of the mounting rail base plate shown in FIG. 1; and,

FIG. 10 is a bottom plan view of the mounting rail base plate shown in FIG. 1.

The broken lines shown in the drawings represent portions of the mounting rail base plate that form no part of the claimed design. 

CLAIM The ornamental design for a mounting rail base plate, as shown and described. 